Entc stuvia Study guides, Class notes & Summaries

Cold Work Prefixes - Answer W (water hardening), O (oil quenching), A (air hardening), D (high C, high Cr) Shock Resisting Prefix - Answer S Hot Work Prefixes - Answer H H10-H19 (chromium types) H20-H39 (tungsten types) H40-H59 (molybdenum types) High Speed Prefixes - Answer M (molybdenum) T (tungsten) Mold Steels Prefix - Answer P Special Purpose Steels Prefix - Answer L Safety in hardening - Answer Risk of damage form the hardening (quench cracks) Depth of hardening - ...

Magnetic particle inspection can be performed on parts made from which materials - Answer Iron, Nickel, Cobalt When a magnetic field cuts across a crack: - Answer Magnetic poles form at the edges of the crack Magnetic particle inspections uses small ferromagnetic particles similar to: - Answer Iron Filings A volume of space where there is a change in magnetic energy is called: - Answer A magnetic field An object that has a magnetic pole on one end and a second equal but opposite magn...

Types of cast irons: - Answer Gray Iron Malleable Iron White Iron Ductile Iron Alloy Irons Malleable iron is ____ - Answer heat treated for ductility White iron is ____ - Answer hard and wear resistant Ductile iron has ____ - Answer some ductility as cast Cast irons are located where on the iron-iron carbide diagram? - Answer Above 2% C Casting methods: - Answer sand casting permanent mold die casting investment casting centrifugal casting shell molding Gray iron can b...

MEMS - Answer Micro-ElectroMechanical Systems [Microstructures] built on silicon, can sense 5 motion senses of acceleration, vibration, shock, tilt, and rotation Applications as gyroscopes or accelerometers (sometimes combined uses) Examples of Nanomaterials - Answer Natural: ATP Synthase, DNA, Silicon Atoms Man-made: Carbon nanotubes Size-Dependency Examples @ Nanoscale - Answer 1 - Lead has a lower melting temperature the smaller the particle radius 2 - Gold changes colors througho...

How does paint protect against corrosion? - Answer Prevents oxygen from touching the metal, acts like a coat What environments affect corrosion? - Answer pH, Temperature, velocity, concentration, inhibitors, cleaning, aeration, gases, acids, bases, salts, & solvents operating conditions affect corrosion: Temperature - Answer Increase rate of reaction operating conditions affect corrosion: Velocity - Answer veolocity of a corrodent over a metal surface affects corrosion rate operating...

The principle of transmissibility states that a force acting at a point on a rigid body can be moved to any other point___________without changing the effect of the force on the rigid body? - Answer Along the line of action of the force. What is the moment of a force about a point/axis? - Answer The tendency of a force to produce rotation about a point/axis. The bodies considered in state analysis are usually considered to be__________? - Answer Rigid. The principle of transmissibility ...